Carbon brush and pigtail.



W. L. BLISS. CARBON BiwsH AND PIGTAIL.

APPLICATION FILED MAY 2, 1910 Patented Sept. 29, 1914.

WILLIAM: E. BLISS, 13F 'fiIIL'Vt fiU 'WKfiCQNSIN, ASSIGNOR, BY ME$NE ASSIGNMENTS NEW YQRK, A CGRPQRATION OF NEN censors AND LEEGTAIL.

L ,1 Yatented Sept 2%,

19 M). Eerie! No. 559,013.

To all whom it may concern Be it known that l, WHLIAM L. Buss, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful improvements in Carbon Brushes and Pigtails, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, form ng a part of this specifics tion.

My invention relates to what is known as pig tails for carbon brushes.

One of the objects of the invention is to provide :1 prect-icsl, simple inexpensive means of securing s lead or other connec tion to e block of carbon, securing the same time, good electrics; contact and me chanical strength.

The embodiment Whichil have Worked out in practice and which illustrates simply one of many Ways of csrrying out my inve "on, is shown in the sccompenying drawings, in which,

Figure 1 is a, perspective view the completely assembled srticle. Fig. 2 is. at side elevation of the carbon blocs. 'Fig. 1S

vertical section thereof. -lf'ig. d is a detailed "View.

The bloclr of carbon 1, may be of any suitable form, and is illustrated as being adapted for use es s dynamo or motor brush. The block has a reduced upper end portion 2, over which fits e metallic cap 3, of any good conducting material such as cross or copper, the external surfsce of the cap and or the block being Flush with each other as in Fig. l. The metallic can is secured to the block by means of rivets a; passing through the holes 5 in the block, which rivets are shown in Fig. l as having recessed end portions 6, before they are into the blo k, while after insertion, projecting ends are spun over to clamp the cap 3 upon the block block has two holes 7, extending upper surface, as shown in Figs. 2 end edspted to receive loosely the screws 8, adopted to engage the screw-threaded hole 9 in each rivet it When the completely assembled es in the engwe e conducting member lb, 3T doubling over a strip oil motel, o of copper or cross, and then bending up one end oi the doubled over portion es sgeinst rurtner noted that the carbon block may be copper plated 1r desired,

clearly shown in this figure, although I do not limit myself to this construction. The end of the bent up portion is adapted to receive the end of a conductor ll, the bored end of which is soldered in the eyelet 1'12, or otherwise secured in good electrical contact.

From the above it will be apparent the carbon is subjected to compression stresses only, and furthermore, that good metallic contact with the carbon block is secured, first, by the rivets which hold the sides of the reiniorcirg piece firmly against the sides of the brush; second, by the screws drewi the rivets against the top sides 0:5 the holes of the carbon block; third, by the screws crossing the reinforcing piece down the top of the brush. it should be before the cop is applied, in order to secure even better contact; r

The invention is not limited to the details of construction shown and described, but includes broadly any equivalent means for accomplishing the some desirable results and coming within the scope of the appended claims.

What I claim as my invention and desire to secure by Letters Patent of the United States is 2-- 1. The combination with :1 carbon brush, of a reinforcing conducting member. having depending portions engaging certain faces of said carbon brush, a rivet passing through said brush and depending portions for holding said members in engagement, end. a removable terminal member held in close contact with said reinforcing member by e screw which engages said rivet;

2. in combination, a carbon block, a llshoped conducting member fitting over said block, rivets for holding said elements together, e terminal member held in engagement with said conducting member by screws, said screws passing loosely through holes in said block and engaging said rivets, and a conductor in permanent electrical contact with said terminal member.

3. in combination, e carbon block halving at reduced portion, a conducting esp having bent down portions engaging said reduced portion, and ilush with the surface of the block, rivets passing through said reduced portion and hsving hesds eugsg'ing" seid bent 1 that down portions, holes extending from said cap into said block beyond the rivets, and screws of smaller diameter than said holes passing through said cap, engaging said rivets. and clamping a terminal member against said cap.

' 4. A carbon block having a hole extending through it another hole perpendicular to said first hole andintersccting it, a cap on said block, a rivet in said first hole having a transverse threaded hole and having heard ed endsfor'securing said cap, a screw passing through said cap, occupying said second hole, and engaging said threaded hole in the rivet.

5. A brush for a dynamo electric machine comprising a contact member, a reinforcing cap inclosing one end of said member, means passing through the sides of said cap and the end of said member for securing said parts together, and securing means for an electric terminal passing through said cap and detachably engaging said cap securing means.

6. A brush for a dynamo electric machine comprising a contact member, a reinforcing cap embracing three sides of said member, securing means passing through two sides of said cap and the end of said contact member, an electric terminal, and means for securing said terminal in contact with said cap comprising securing means passing through said terminal and said cap and engaging said cap securing means.

7. Means for attaching a terminal to a carbon block comprising a reinforcing member embracing opposite sides of said block, securing means passing through said block and the opposite sides of said reinforcing member, an. electric terminal, and means for clamping said terminal. position, said means con'iprising members passing through said terminal and removably engaging said securing means.

8. In a brush for dynamo electric machines, a carbon block, a reinforcing cap embracing one end and two sides of said block, securing means passing through the sides of said cap and said block, a terminal comprising a metallic strip bent on itself, an electric conductor secured in the bend of said terminal, and means for clamping said ter minal against the end of said cap, said. means comprising fastening members passing-through said terminal and cap and removably engaging said securing means.

Inwitness whereof, I have hereunto subscribed my name in the presence of two Witnesses.

- WILLIi-Qi L. BLISS. Witnesses .HEmiY F. Veer,

G-Eo. B. Jones. 

